An ATR (Average True Range) stop loss is a risk management method that uses market volatility to determine where a stop loss should be placed. The Average True Range indicator measures how much an asset typically moves over a specific period, helping traders set stop losses that adapt to changing market conditions rather than relying on a fixed number of pips or points.

The ATR was developed by J. Welles Wilder Jr. and is widely used in Forex, stocks, commodities, and cryptocurrency markets. When volatility is high, the ATR value increases, suggesting that a wider stop loss may be needed. When volatility is low, the ATR value decreases, allowing for a tighter stop loss.

A common approach is to place the stop loss a multiple of the ATR away from the entry price. For example, if the ATR is 50 pips and a trader uses a 2× ATR stop loss, the stop would be placed 100 pips from the entry. In a long trade, the stop loss is placed below the entry price, while in a short trade, it is placed above the entry price.

One of the main advantages of an ATR stop loss is that it accounts for normal market fluctuations, reducing the chances of being stopped out by minor price movements. It also helps traders maintain consistent risk management across different market conditions.

However, ATR stop losses should not be used alone. Many traders combine them with support and resistance levels, trend analysis, or other technical tools to improve trade management and increase the effectiveness of their trading strategy.